Question

Which of the following is non-degradable?

• A. CO\textsubscript{2}
• B. DDT
• C. O\textsubscript{3}
• D. SO\textsubscript{2}

Hint:

DDT is persistent in the environment, causing bioaccumulation and ecological harm, unlike naturally occurring gases like CO\textsubscript{2}, O\textsubscript{3}, and SO\textsub{2}.

Answer 1

The Correct Option is B

DDT (Dichlorodiphenyltrichloroethane) is a synthetic pesticide that is non-degradable and remains in the environment for a long period, causing harm to the ecosystem. Unlike CO\textsubscript{2}, O\textsubscript{3}, and SO\textsubscript{2}, which either break down naturally or play essential roles in atmospheric processes, DDT accumulates in organisms and can cause severe ecological damage.
Step 1: Analyze the options.
(A) CO\textsubscript{2}: Carbon dioxide is a naturally occurring gas that is part of the carbon cycle and is degradable by natural processes like photosynthesis.
(B) DDT: This is the correct answer because DDT is non-degradable and harmful to the environment.
(C) O\textsubscript{3}: Ozone is a naturally occurring gas in the Earth's stratosphere and is involved in the ozone-oxygen cycle. It is degradable and does not accumulate in harmful ways.
(D) SO\textsubscript{2}: Sulfur dioxide is produced naturally (e.g., from volcanic eruptions) and by human activities, and it breaks down in the atmosphere.
Step 2: Conclusion.
DDT is the only non-degradable compound listed, making (B) the correct answer.
Final Answer: \[ \boxed{(B) \, \text{DDT}} \]